Create role/role binding/service account required for builder/function pods (#2667)

* service account changes for fission-builder
* moved code into executor
* changed default timing to 30 min
* code refactor and add new roles for executor
* create role if serviceAccountCheck is enabled

charts/fission-all/templates/_fission-kubernetes-roles.tpl

@@ -117,6 +117,28 @@ rules:
   - get
   - list
   - watch
+{{- if .Values.executor.serviceAccountCheck.enabled }}  
+- apiGroups:
+  - ""
+  resources:
+  - serviceaccounts
+  verbs:
+  - create
+  - get
+- apiGroups:
+  - authorization.k8s.io
+  resources:
+  - localsubjectaccessreviews
+  verbs:
+  - create   
+- apiGroups:
+  - rbac.authorization.k8s.io
+  resources:
+  - rolebindings
+  - roles
+  verbs:
+  - create
+{{- end }}      
 - apiGroups:
   - apps
   resources:

charts/fission-all/templates/executor/deployment.yaml

@@ -77,6 +77,12 @@ spec:
         - name: CONTAINER_OBJECT_REAPER_INTERVAL
           value: {{ .Values.executor.container.objectReaperInterval | quote }}
         {{- end}}
+        {{- if .Values.executor.serviceAccountCheck.enabled }}
+        - name: SERVICEACCOUNT_CHECK_ENABLED
+          value: {{ .Values.executor.serviceAccountCheck.enabled | quote }}  
+        - name: SERVICEACCOUNT_CHECK_INTERVAL
+          value: {{ .Values.executor.serviceAccountCheck.interval | quote }}
+        {{- end}}  
         {{- include "fission-resource-namespace.envs" . | indent 8 }}
         - name: HELM_RELEASE_NAME
           value: {{ .Release.Name | quote }}

charts/fission-all/values.yaml

@@ -193,6 +193,13 @@ executor:
     ##
     ## objectReaperInterval: 5
 
+  serviceAccountCheck:
+    ## enables fission to create service account, roles and rolebinding for missing permission for builder and fetcher.
+    enabled: true
+    ## indicates the time interval in minutes, after that fission will create service account, roles and rolebinding for builder and fetcher.
+    ## interval will be applicable only if enable value is set to true.
+    ## default timing will be 30 minutes.
+    interval: 30  
 ## router is responsible for routing function calls to the appropriate function.
 ##
 router: